Electric-light socket.



W. BREIDENBAOH.

ELECTRIC LIGHT SOCKET. APPLICATION FILED NOV. 17, 1913.

1,086,648. Patented Feb. 10,l914.

IINITED SATS ELECTRIC-LIGHT SOCKET.

To all whom it may concern Be it known that I, IVIIJJAM BREIDEN- BACH, acitizen of the United States, resid ing at Indianapolis, in the countyof Marion, State of Indiana, have invented certain new and usefulImprovements in Electric-Light Sockets; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in electric light sockets.

The principal object of the invention is to provide a socket of thescrew type into which an electric lamp may be screwed and locked in suchposition against removal.

Other objects and advantages will be apparent from the followingdescription, when taken in connection with the accompanying drawings.

In the drawings: Figure 1 is an elevation of an electric light socketmade in accordance with my invention. Fig. 2 is a vertical longitudinalsectional view therethrough. Fig. 3 is an end view of the socket, thelamp being removed. Fig. 4c is a vertical section on the line a a ofFig. 2. Fig- 5 is an enlarged detail view of one of the lockingelements. Fig. 6 is a horizontal sectional view on the line 66 of Fig.2.

Referring particularly to the accompanying drawings, 10 represents theusual porcelain base. Secured to the outer end of the base is a ring 11,which is provided at its upper edge with the inwardly directedperipheral flange 12, and on its lower edge the inwardly extendingperforated attaching lugs 11. A threaded lamp receiving tube 13 isdisposed within the ring and has on its inner end the peripheral flange13 which is rotatable between the flange 12 and the lugs 11. Inwardlyextending fingers 14 are carried by the inner end of the tube 13, andare adapted to move in close proximity to the outer end of the base.Secured to the porcelain base and extending inwardly toward the centerthereof is the center contact spring 15 which is provided at its innerend with a contact pin or point 16, this being arranged for contactwit-h the central brass plate in the end of the threaded stem 17 of thelamp 18. Mounted in the base is the usual snap switch which includes thespring-pressed plunger 19, the switch Specification of Letters Patent.

Application filed November 17, 1913.

Patented Feb. 16,1914.

Serial No. 801,537.

key 20 and the cam block 21 mounted therein and disposed in engagementwith the spring plunger. At the other side of the base is mounted ametal plate 22 which is provided with the vertical parallel arms 23, andbetween which is vertically guided a transverse head 26, said headcarrying a vertical pin 25 passing through an opening 24: formed in thebase. Encircling the pin, and engaging with its opposite endsrespectively with the end of the socket in the base 23 and with thetransverse head so that the pin is normally held in lowered position isa coil spring 26. J ournaled in the lower portion of the casing is atransverse shaft 27 on which is mounted a cam block 28, this block beingdisposed between the arms 23 and below the head 26. The shaft extendsthrough an opening 29 in one side of the metal sleeve 30 of the socketand is provided with an angular end which is adapted to be received in acorrespondingly shaped socket in the end of a key 32.

In the normal position of the block 28, the long side is in engagementwith the cross head 26, the spring holding the pin in lowered positionso that the outer end thereof is out of the path of the fingers 14. Inthis position, the lamp and threaded sleeve or tube will be free torotate together, thus preventing the unscrewing and removal of the lamp.To permit the removal of the lamp, the key is engaged with the shaft 27and turned so that the outer end of the pin 25 will be forced beyond theouter end of the base and into the path of the fingers 1 In the act ofunscrewing the lamp the sleeve will rotate until one of the fingersengages with the pin 25, thus holding the sleeve, and permitting thelamp to be unscrewed clear out of the sleeve.

What is claimed is:

In an electric light socket, an insulated base having an opening, arotatable threaded sleeve arranged to receive the threaded stem of alamp, a guide member including parallel arms mounted in the base, saidthreaded sleeve having inwardly projecting fingers at the inner endthereof, and an inwardly directed flange on the outer end, a ringsecured to the base and having an inwardly directed circular flangeembracing the flange of the threaded sleeve, a pin disposed through theopening of the base, a transverse head carried by the inner end of thepin and slidably disposed between the said head to force the pin intothe path of 10 arms of the said guide a spring carried by the fingers ofthe said threaded sleeve to the pin disposed between the said head andprevent rotation of the same.

the end of the base, a shaft transversely In testimony whereof, I afliXmy signamounted in the inner ends of the arms, one ture, in presence oftwo Witnesses.

end of the said shaft being formed for 00- \VILLIAM BREIDENBACH.operation with a he and a cam block car- Witnesses:

i'ied by the shaft and located between the PHILIP G. WESLEY,

arms in position for engagement with the FRED. HEIER.

fiopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Eatente, Washington, D 0.

